A novel two-way method for dynamically coupling a hydrodynamic model with a discrete element model(DEM)  

作　　者：Yan Xiong Qiuhua Liang Samantha Mahaffey Mohamed Rouainia Gang Wang 熊焱;Qiuhua Liang;Samantha Mahaffey;Mohamed Rouainia;王岗(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University;School of Architecture, Building and Civil Engineering, Loughborough University;School of Engineering, Newcastle University)

机构地区：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China [2]School of Architecture,Building and Civil Engineering,Loughborough University,Loughborough,UK [3]School of Engineering,Newcastle University,Newcastle upon Tyne,England,UK

出　　处：《Journal of Hydrodynamics》2018年第5期966-969,共4页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the China Scholarships Council(No.201606710054);the UK NERC SINATRA and TENDERLY projects(Grant No.NE/K008781/1);the State Major Project of Water Pollution Control and Management(2017ZX07603-001)

摘　　要：The effect of floating objects has so far been little considered for hazard risk assessment and structure design, despite being an important factor causing structural damage in flood-prone and coastal areas. In this work, a novel two-way method is proposed to fully couple a shock-capturing hydrodynamic model with a discrete element model （DEM） for simulation of complex debris-enriched flow hydrodynamics. After being validated against an idealized analytical test, the new coupled model is used to reproduce flume experiments of floating debris driven by dam-break waves. The numerical results agree satisfactorily with the experimental measurements, demonstrating the model＇s capability and efficiency in simulating complex fluid-debris interactions induced by violent shallow flows.The effect of floating objects has so far been little considered for hazard risk assessment and structure design, despite being an important factor causing structural damage in flood-prone and coastal areas. In this work, a novel two-way method is proposed to fully couple a shock-capturing hydrodynamic model with a discrete element model （DEM） for simulation of complex debris-enriched flow hydrodynamics. After being validated against an idealized analytical test, the new coupled model is used to reproduce flume experiments of floating debris driven by dam-break waves. The numerical results agree satisfactorily with the experimental measurements, demonstrating the model＇s capability and efficiency in simulating complex fluid-debris interactions induced by violent shallow flows.

关 键 词：Coupled model  discrete element model （DEM） extreme hydraulic conditions floating debris shallow water equations Godunov-type finite volume method 

分 类 号：O352[理学—流体力学]